There's a lot of medication pigeon fanciers buy, and do not realise it contains enrofloxacin. Baytril is only a product name because it comes from the company Bayer. Many pigeon fanciers throw their arms up in the air and say they'd never use Baytril, but without realising they have been using it for a long time and a number of years. My advice is always check your active ingredient, and the De Weerdt products do not allow you to see this.